Ingrown Toenail: What You Can Safely Do at Home and When You Need a Clinician

What causes an ingrown toenail?

Ingrown toenails — called onychocryptosis in clinical settings — occur when the edge or corner of a nail grows downward into the skin of the nail fold rather than extending out over it. The big toe is affected in the great majority of cases 1Ref 1Chabchoub I, Litaiem N (2022).Ingrown Toenails.Epidemiology: big toe affected in the majority of cases; ingrown toenails affect people of all ages, most commonly 10–30 years; up to 20% of foot-related primary care visits.

The most common causes:

• Cutting the nail incorrectly — rounding the corners, cutting too short, or tearing rather than clipping the nail lets the surrounding skin fold over the nail edge as it grows back
• Tight or narrow-toed footwear — prolonged compression pushes the skin into the path of the growing nail
• Naturally curved nails — some people have a more curved or fan-shaped nail plate by anatomy, which predisposes them to ingrowth regardless of technique
• Nail trauma — repeated pressure from running or other sport, or a single impact, can alter how the nail grows
• Fungal nail infection — a thickened, distorted nail from onychomycosis can change the direction of growth

Once the nail edge breaks the skin, the tissue becomes inflamed. Bacteria entering through that break can turn a painful but straightforward problem into a paronychia — a bacterial infection of the nail fold.

How common is this?

Ingrown toenails are one of the most common nail conditions seen in primary care. They occur across all age groups but are most frequent between the ages of 10 and 30, and studies report that up to 20% of foot-related primary care visits are for this problem 1Ref 1Chabchoub I, Litaiem N (2022).Ingrown Toenails.Epidemiology: big toe affected in the majority of cases; ingrown toenails affect people of all ages, most commonly 10–30 years; up to 20% of foot-related primary care visits. Men are affected more often than women.

What can you safely do at home for a mild case?

Home care is reasonable for early ingrown toenails where the nail edge is pressing into the skin but there is no pus, no foul odor, no spreading redness, and no underlying condition that affects healing.

What helps:

1. Soak the foot in warm water for 15–20 minutes, two to four times a day. This softens the skin and reduces discomfort 2Ref 2Mayeaux EJ Jr, Carter C, Murphy TE (2019).Ingrown Toenail Management.Home care steps (soaking, cotton wisp/dental floss technique, wide toe-box footwear); 79% symptomatic improvement rate with cotton wisps; recurrence and prevention guidance. 2. After soaking, gently push the skin fold away from the nail edge using a clean cotton swab. Do not force it. 3. Cotton wisp or dental floss technique — a small wisp of cotton or a strand of dental floss tucked gently under the nail edge can encourage the nail to grow away from the skin. An uncontrolled case series found a 79% rate of symptomatic improvement using this approach 2Ref 2Mayeaux EJ Jr, Carter C, Murphy TE (2019).Ingrown Toenail Management.Home care steps (soaking, cotton wisp/dental floss technique, wide toe-box footwear); 79% symptomatic improvement rate with cotton wisps; recurrence and prevention guidance. Evidence from randomized trials is limited, so this is a reasonable supportive measure rather than a proven cure. 4. Wear open-toed shoes or footwear with a wide toe box to remove pressure while the toe heals. 5. Keep the area clean and dry between soaks.

What to avoid:

• Do not cut the nail shorter or try to dig out the corner — this is the most common mistake and reliably makes things worse
• Do not apply commercial "ingrown toenail" solutions with strong acid or caustic agents without clinical guidance
• Do not pick at or repeatedly disturb the nail fold, which introduces bacteria

When does an ingrown toenail need a clinician?

Home care has limits. See a primary care provider, podiatrist, or urgent care clinician if any of the following apply:

• There is pus, discharge, or foul odor from the nail fold — this signals bacterial infection (paronychia) that home care cannot clear
• Redness and warmth are spreading beyond the immediate nail margin onto the toe or foot — possible cellulitis
• Home care has not improved symptoms within a few days
• You have diabetes, peripheral arterial disease, neuropathy, or an immune condition — even a mild-looking ingrown nail warrants prompt professional evaluation in these situations (see below)
• The toe has been a recurring problem despite good nail-care technique — a permanent procedure may be warranted

For people without complicating conditions, a clinician can perform a partial nail avulsion — a brief in-office procedure, done under local anesthetic, where the ingrown nail edge is removed. This provides rapid pain relief 3Ref 3Exley V, Jones K, O'Carroll G, Watson J, Backhouse M (2023).A systematic review and meta-analysis of randomised controlled trials on surgical treatments for ingrown toenails part I: recurrence and relief of symptoms.Phenolization after partial nail avulsion reduces recurrence risk vs avulsion alone (RR 0.13, 95% CI 0.06–0.27); 36 RCTs, 3,756 participants; evidence rated low quality overall. When the nail matrix (the root zone) is treated chemically at the same time — typically with phenol — the ingrown portion is much less likely to grow back. A 2023 systematic review found that phenolization after partial avulsion reduced recurrence risk substantially compared to avulsion alone, with a risk ratio of 0.13, though the authors noted the overall quality of supporting trials was low 3Ref 3Exley V, Jones K, O'Carroll G, Watson J, Backhouse M (2023).A systematic review and meta-analysis of randomised controlled trials on surgical treatments for ingrown toenails part I: recurrence and relief of symptoms.Phenolization after partial nail avulsion reduces recurrence risk vs avulsion alone (RR 0.13, 95% CI 0.06–0.27); 36 RCTs, 3,756 participants; evidence rated low quality overall.

A companion systematic review of the same trial pool found that phenolization was associated with lower pain scores and shorter pain duration compared to avulsion alone, at the cost of a somewhat longer healing time 4Ref 4Exley V, Jones K, O'Carroll G, Watson J, Backhouse M (2023).A systematic review and meta-analysis of randomised controlled trials of surgical treatments for ingrown toenails part II: healing time, post-operative complications, pain, and participant satisfaction.Phenolization associated with lower pain scores and shorter pain duration compared to avulsion alone; trade-off with healing time.

For recurrent ingrown nails, a more permanent chemical or surgical matrixectomy prevents the involved strip of nail from growing back entirely. A network meta-analysis comparing chemical agents found trichloroacetic acid (TCA) to be comparable to phenol for reducing recurrence, with the potential advantage of less systemic toxicity 5Ref 5Chang HC, Lin MH (2020).Comparison of Chemical Matricectomy with Trichloroacetic Acid, Phenol, or Sodium Hydroxide for Ingrown Toenails: A Systematic Review and Network Meta-Analysis.TCA comparable to phenol for reducing recurrence of ingrown toenails after partial avulsion; TCA has potential safety advantage of no systemic toxicity.

Why diabetes and poor circulation change the picture entirely

For people with diabetes, peripheral arterial disease, peripheral neuropathy, or impaired immunity, no foot wound — however minor it looks — should be self-managed.

The reasons are structural:

• Neuropathy reduces or eliminates pain sensation, so a serious infection can develop without the usual warning of increasing pain
• Poor circulation impairs the immune response and wound healing — what would clear easily in a healthy foot may progress to deep soft tissue infection or bone involvement (osteomyelitis) in someone with vascular disease
• Impaired glucose control in diabetes further compromises infection clearance

A 2025 Mendelian randomization study found a causal association between type 1 diabetes and ingrown nail development, with the risk amplified substantially when vascular or renal complications of diabetes were also present 6Ref 6He S, Xue S, Chen W, Deng Z, Li E, Zhao J (2025).The causal relationship of type 1 diabetes and its complications on ingrown nails: Insights from a multivariable Mendelian randomization study.Causal association between type 1 diabetes and ingrown nail development (OR 1.09, 95% CI 1.05–1.12); risk amplified substantially with diabetic vascular and renal complications. For this population, surgical nail avulsion should be planned carefully with attention to vascular status, and a clinician experienced in diabetic foot care should be involved.

The American Diabetes Association's Standards of Care emphasize that any foot wound in a person with diabetes warrants prompt professional evaluation, and this principle applies to ingrown toenails 7Ref 7American Diabetes Association Professional Practice Committee (2024).Standards of Care in Diabetes — 2024.ADA Standards of Care: any foot wound in a person with diabetes warrants prompt professional evaluation.

How to prevent ingrown toenails from coming back

Most recurrences are preventable with consistent attention to two things: how you cut your nails and what you put on your feet.

Nail-cutting technique: - Cut toenails straight across, level with the tip of the toe - Do not curve or round the corners - Do not cut so short that the skin at the tip can fold over the nail edge - Use proper nail scissors or clippers — not tearing or peeling

Footwear: - Choose shoes with an adequate toe box that does not compress the toes - Athletic footwear should be properly sized; runners in particular are at higher risk due to repeated downward force on the nail

Nail infections: - If you have a fungal nail infection causing thickening or distorted growth, treating that infection reduces the secondary risk of ingrowth

Anatomy: - Some people have naturally curved nail plates that are prone to ingrowth regardless of technique. If ingrown toenails recur despite careful nail care, ask a podiatrist or dermatologist whether your nail shape warrants a preventive procedure to permanently narrow the nail edge 2Ref 2Mayeaux EJ Jr, Carter C, Murphy TE (2019).Ingrown Toenail Management.Home care steps (soaking, cotton wisp/dental floss technique, wide toe-box footwear); 79% symptomatic improvement rate with cotton wisps; recurrence and prevention guidance.